Anthony Davis won’t play Sunday because of concussion

Niners backup right tackle Anthony Davis has been ruled out for Sunday’s game at Carolina because of a concussion he sustained in Thursday’s practice.

Davis did not report his concussion until after practice, which is why he was not listed on the injury report until today, the team said.

In 2014, Davis sustained his first concussion and was sidelined for four games while he struggled with serious symptoms. Davis said he felt like he was in a “white fog” for the first few days after his concussion.

He left the NFL in June 2015, citing a desire to let his “brain and body” heal, although he said during training camp he wasn’t having post-concussion symptoms when he returned to play at the end of the 2014 season.

On Saturday, Davis missed practice amid a report he was considering retirement, which he denied this week.

Both Davis and head coach Chip Kelly cited a “miscommunication” as the reason he missed practice Saturday. They also said his sudden move from starting right guard to backup tackle after his practice absence was Kelly’s decision.

With Davis sidelined, John Theus, a rookie fifth-round pick, will serve as the swing tackle Sunday. If left tackle Joe Staley was sidelined, it’s likely right tackle Trent Brown would slide over to his side and Theus would assume Brown’s spot.